Diamond



FIG. 1 is a front view of the diamond, the back view of the diamondbeing substantially identical thereto;

FIG. 2 is a right side view of the diamond shown in FIG. 1, the leftside view of the diamond being substantially identical thereto;

FIG. 3 is a top view of the diamond shown in FIG. 1; and,

FIG. 4 is a bottom view of the diamond shown in FIG. 1.

The ornamental design for a diamond, as shown and described.